Tackifying device for producing polyester material for high-viscosity low-end-shrinkage base film

Abstract

The utility model discloses a tackifying device for producing a polyester material for a high-viscosity low-end shrinkage base film, which comprises a tackifying reaction kettle, a scraper condenser in pumping connection with the tackifying reaction kettle and a melt pump in pumping connection with the tackifying reaction kettle, a medium outlet of the scraper condenser is connected with the hot well, the vacuum pump is communicated with the heat exchanger through a bypass pipe and is connected with the scraper condenser through the hot well, and the tackifying reaction kettle is a horizontal reaction kettle. And when the polymer reaches the viscosity value required by the subsequent process, the material reacted by the tackifying reaction kettle is conveyed to a melt inlet of the subsequent film drawing equipment through the melt pump to be subjected to a film drawing process.

Description

Technical Field

[0001] The utility model belongs to the technical field of polymer tackifying, and particularly relates to a tackifying device for polyester materials used in the production of high-viscosity low-end shrinkage base films. Background Art

[0002] The existing traditional polymer tackifying process has a high cost, a high proportion of raw material loss, and a low tackifying effect. The formed products will have uneven thickness. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a tackifying device for polyester materials used in the production of high-viscosity low-end shrinkage base films, which is used to solve the problems that the viscosity of the polymer cannot meet the requirements, the proportion of raw material loss is high, and the formed products will have uneven thickness.

[0004] In order to solve the above technical problems, the solution of the utility model is: a tackifying device for polyester materials used in the production of high-viscosity low-end shrinkage base films, including a tackifying reaction kettle, a scraper condenser connected to the tackifying reaction kettle by pumping, and a melt pump connected to the tackifying reaction kettle by pumping. The scraper condenser is connected to a vacuum pump through a top riser pipe. The medium outlet of the scraper condenser is connected to a hot well. The vacuum pump is connected to the scraper condenser through a bypass pipe communicating with a heat exchanger through the hot well. The material after the reaction in the tackifying reaction kettle is transported to the melt inlet of the subsequent film drawing device through the melt pump for the film drawing process.

[0005] Preferably, the tackifying reaction kettle is a horizontal reaction kettle.

[0006] Preferably, the rotation speed of the horizontal reaction kettle is 2.2 rpm.

[0007] Compared with the prior art, the beneficial effects of the utility model are:

[0008] 1. The viscosity of the PTA polymer is improved;

[0009] 2. The production cost is reduced;

[0010] 3. The problem of uneven thickness of the formed products is solved. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the utility model. Detailed Embodiments

[0012] The following further describes the detailed embodiments of the utility model with reference to the drawings. It should be noted here that the description of these embodiments is for helping to understand the utility model, but does not constitute a limitation to the utility model. In addition, the technical features involved in the various embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0013] Refer to Figure 1 Figure 1 , a viscosity increasing device for polyester materials used in the production of high-viscosity low-end shrink base films, includes a viscosity increasing reaction kettle 1, a scraper condenser 2 pump-connected to the viscosity increasing reaction kettle 1, and a melt pump 3 pump-connected to the viscosity increasing reaction kettle 1. The scraper condenser 2 is connected to a vacuum pump 4 through a top riser pipe. The medium outlet of the scraper condenser 2 is connected to a hot well 5. The vacuum pump 4 is connected to a heat exchanger 6 through a bypass pipe and is connected to the scraper condenser 2 through the hot well 5. The material after the reaction in the viscosity increasing reaction kettle 1 is transported to the melt inlet of the subsequent film drawing equipment by the melt pump 3 for the film drawing process.

[0014] Specifically, the viscosity increasing reaction kettle 1 is a horizontal reaction kettle with a rotation speed of 2.2 rpm. The material undergoes a polymerization reaction at 282 ± 1 °C and about 70 Pa to form a thin stream or broken film-like substance, which is conducive to the evaporation and circulation of ethylene glycol.

[0015] Furthermore, the viscosity value of the polymer in the viscosity increasing reaction kettle 1 is 0.75 dl / g - 0.8 dl / g. When the polymer reaches the required viscosity value of 0.75 dl / g - 0.8 dl / g for the subsequent process, the polymer is transported to the melt inlet of the subsequent film drawing equipment by the melt pump 3 for the film drawing process.

[0016] Specifically, the scraper condenser 2 uses 26 °C ethylene glycol spray condensation.

[0017] The working principle of the present utility model: The material enters the viscosity increasing reaction kettle 1 and undergoes a polymerization reaction at a rotation speed of 2.2 rpm, a temperature of 282 ± 1 °C, and 70 Pa. In the inlet area of the viscosity increasing reaction kettle 1, the viscosity of the material is relatively low, and the polymer is lifted and dropped by the mesh disk to form a thin stream or broken film-like substance. In the rear area of the viscosity increasing reaction kettle 1, when the polymer reaches a certain viscosity, when the polymer is lifted and dropped by the disk, it will adhere to the disk to form a thin stream and a thin film. The higher the viscosity, the closer it is to the thin film, thus forming a larger evaporation surface area, which is more conducive to the evaporation of ethylene glycol. The ethylene glycol vapor evaporated during the viscosity increasing reaction process is extracted from the upper part of the disk reaction kettle and is spray-condensed by the scraper condenser 2 with 26 °C ethylene glycol. The sprayed ethylene glycol is recirculated and cooled using chilled water for cooling and spraying the ethylene glycol. Most of the fresh ethylene glycol required in the viscosity increasing reaction kettle 1 is replenished from this device. The non-condensable gas coming out of the scraper condenser 2 enters the ethylene glycol liquid ring pump and is discharged after reaching the vacuum pump 4. When the polymer reaches the required viscosity value of 0.75 dl / g - 0.8 dl / g for the subsequent process, the polymer is transported to the melt inlet of the subsequent film drawing equipment by the melt pump 3 for the film drawing process.

[0018] The above has described the embodiments of the present utility model in detail with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present utility model, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present utility model.

Claims

1. A viscosity increasing device for producing polyester materials for high-viscosity low-end shrink film, characterized in that: It comprises a viscosity increasing reaction kettle (1), a scraper condenser (2) connected to the viscosity increasing reaction kettle (1) by pumping, and a melt pump (3) connected to the viscosity increasing reaction kettle (1) by pumping, the scraper condenser (2) is connected to a vacuum pump (4) via a top air riser, the medium outlet of the scraper condenser (2) is connected to a hot well (5), the vacuum pump (4) is connected to a heat exchanger (6) via a bypass pipe and connected to the scraper condenser (2) via the hot well (5), and the material after the reaction in the viscosity increasing reaction kettle (1) is transported to the melt inlet of the subsequent film drawing equipment via the melt pump (3) for the film drawing process.

2. The viscosity increasing device for producing polyester material for high-viscosity low-end shrink film according to claim 1, characterized in that: The viscosity-increasing reactor (1) is a horizontal reactor.

3. The viscosity increasing device for producing polyester material for high viscosity low end shrink film according to claim 2, characterized in that: The rotation speed of the horizontal reactor is 2.2 rpm.

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